NATURAL SCIENCES OF PHILADELPHIA. 219 



ventral! valde convexo oblique obovato-oblongo valde obtuso patenti-decurvo, 

 dorsali dimidio minori baud augustiori minus convexo erecto-subverticali vel 

 subappresso orbiculato vel late ovato, apice subacute grossius dentato leniter 

 iucurvo, margine externa ad basin longe producta ciliis valde longioribus 

 subdecompositis deflexis drnata ; perianthio compresso oblongo terminali, ore 

 subciliato. — -nep. Bor. Amer. Exsic. ined , No. 19. 



On Redwood trees and stumps, California, Dr. H. N. Bolander. 



Remarkable for the long, deflexed, often compound cilia3 on the attenuated 

 outer basal angle of the dorsal lobe of the leaf, and for the leaves retaining 

 their position and shape in drying. IXestmhles S. 7ieviorosa in general appear- 

 ance, but is rather smaller than the ordinary forms of that species, with longer 

 and narrower, more obovate, and much more coarsely-toothed leaves. 



JUNGERMANNIA RIGIDA, Aust. 



J. examphigastriata, subrobusta: caule decumbente flexuoso rigido nudo ex 

 apice prolifero ; foliis sursuni increscentibus erecto-conniventibus arete im- 

 bricatis oblique cordato-orbiculatis rotundntis integerrimis, margine flexuoso- 

 unduhitis prascipue dorsali subsinuatis ventrali intlexis ; perianthio terminali 

 mox laterali obovato-oblongo plurimum plicato demum versus basin nudo, 

 ore ciliato ; involucri foliis ciliatis. 



Sandwich Islands. Communicated by Dr. H. N. Bolander, 1865. 



Differs from J. flexicaulis, Nees., Syn. Hep. p. 8T, in the undulate leaves 

 — those of the involucre ciliate, and in the multi-plicate perianth. 



J. colorata, Lehm., Syn. Hep., p. 86, differs in the leaves being more conni- 

 vent and orbicular, smaller, and not undulate, &c. 



J. grandijlora, L. & G., Syn. Hep., p. 673, differs in its small subtrifid invo- 

 lucral leaves, connate with the amphigastria. 



JUNGERMANNIA ROBUSTA, AuSt. 



J. examphigastriata ; caule stricto vel subarcuato erecto ex apice prolifero- 

 continua e ventre toto longitudine radiculoso ; foliis pallidis exacte verticali- 

 bus late oblique cordato-ovatis rotundatis, toto margine niinutissime eroso- 

 dentatis dorsali undulatis subsinuatis subdecurrentibus ; perianthio terminali 

 subcylindrico triangulari-subcompresso basi nudo ore plicato subciliato ; 

 involucri foliis subbilobis, lobo ventrali subciliato-denticulato, altero integro. 



Sandwich Islands. Communicated by Dr. H. N. Bolander, 1865. 



Dilfers from J. rigida in its pale color, much larger size, more vertical 

 leaves eroded-dentate on the margin, in its bilobed involucral leaves, longer 

 and less plicated perianth, and radiculose stems. 



J colorata, a closely related species, is smaller, with more orbicular and 

 connivent, reddish leaves not undulate on the dorsal margin. 



JUNGERMANNIA CORIACEA, AuSt. 



J. caule repente vel adscendeute subramoso radiculoso ; foliis subcoriaceis 

 rigidis arete imbricatis madefactis patulis siccatis subverticalibus ovato-ob- 

 longis obtusis planiusculis, margine subrepandis integerrimis dorsali subdecur- 

 rentibus ; perianthio magno cylindrico-oblongo subhievi, ore subplicato minute 

 ciliato ; foliis involucralibus subbilobis incisodentatis, basi ventrali minute 

 lobulatis, cum stipulis parcis lanceolatis vel oblongis acute bi-quadrifidis in- 

 termixtis. 



Sandwich Islands. Communicated by Dr. H. N. Bolander, 1865. 



Remarkable for its large size, and for the thick epidermis of the leaves, 

 ■which are of a reddish color. 



Diflftrs from J. grandiftora, L. & G., Syn. Hep., p. 673, in its oblong leaves, 

 those of the involucre slightly enlarged and not connate with the amphigas- 

 tria ; also in the radiculose stem. There are no amphigastria except at or 

 near the base of the perianth, and these (about four in number) are situated on 



1869.] 



